I'm setting up a 60 gallon cube and wanting feedback about plumbing. The way the tank is set up now the 1" pvc return plumbing narrows down to a 1/2" bulkhead where it returns to the display (hole drilled just below the baffles on the side of the overflow). My question is if narrowing the flow down to 1/2" is too narrow and won't creat enough overturn for a 60 gal or cause too much back pressure on my Waveline DC 1050 gph pump? I was thinking I could expand the 1/2" return hole using a dremel to a 3/4" hole and use 3/4" loc line to the tank instead of the 1/2" loc line I have now. Thanks for your thoughts.